Fungicidal composition containing thio-carbamyl-v-lactones

ABSTRACT

A fungicidal composition comprising a fungicidally effective amount of a compound having the formula:   WHEREIN R stands for hydrogen or lower alkyl, Z stands for oxygen or sulphur, X and Y each stand for hydrogen or alkyl of up to 12 carbon atoms or together with the adjacent nitrogen atom represent a hexamethylenimino, morpholino, or piperidino ring or wherein X stands for a hydrogen atom and Y stands for allyl, chlorophenyl, phenyl-substituted alkyl containing one to two carbon atoms, phenyl, morpholino, dialkylamino containing up to 3 carbon atoms in each alkyl group, ethoxycarbonylmethyl, tetrahydropyran-2-yl methyl, or 5-methyl-2-oxo-3thiocarbamylthio-tetrahydrofuran-ethylene, R being alkyl when Y is alkyl, in admixture with a diluent for said compound. These compositions are useful for the control of blast on rice (Piricularia oryzae), rust on wheat (Puccinia triticina) and sore skin on cotton (Rhizoctonia solani).

United States Patent Ghosh et al.

[54] FUNGICIDAL COMPOSITION CONTAINING THIO-CARBAMYL-V- LACTONES [72] Inventors: Ranljit Ghosh; Nigel Douglas Bishop, both of Bracknell, England Imperial Chemical Industries Limited, London, England [22] Filed: March 28, 1969 [21] App]. No.: 832,526

Related US. Application Data [62] Division of Ser. No. 526,380, Feb. 10, 1966, Pat. No.

[ 73] Assignee:

[51] Int. Cl. ..A0ln 9/12, AOln 9/22, AOln 9/28 [58] Field of Search ..424/248, 267, 279, 283

[56] References Cited FOREIGN PATENTS OR APPLICATIONS Germany Great Britain 51 July 18,1972

Primary Examiner-Albert T. Meyers Assistant Examiner-Allen J. Robinson Attorney-Cushman, Darby & Cushman [57] ABSTRACT A fungicidal composition comprising a fungicidally effective amount of a compound having the formula:

going} wherein R stands for hydrogen or lower alkyl, Z stands for oxygen or sulphur, X and Y each stand for hydrogen or alkyl of up to 12 carbon atoms or together with the adjacent nitrogen atom represent a hexamethylenimino, morpholino, or piperidino ring or wherein X stands for a hydrogen atom and Y stands for ally], chlorophenyl, phenyl-substituted alkyl containing one to two carbon atoms, phenyl, morpholino, dialkylamino containing up to 3 carbon atoms in each alkyl group, ethoxycarbonylmethyl, tetrahydropyran-Z-yl methyl, or 5- methyl-2-oxo-3-thiocarbamylthio-tetrahydrofuran-ethylene, R being alkyl when Y is alkyl, in admixture with a diluent for said compound. These compositions are useful for the control of blast on rice (Piricularia oryzae), rust on wheat (Puccinia triticina) and sore skin on cotton (Rhizoctonia solani).

2 Claims, No Drawings FUNGICIDAL COMPOSITION CONTAINING THIO- CARBAMYL-V-LACTONES This application is a division of my copending application Ser. No. 526,380, filed Feb. 10, 1966, and now issued as U.S. Pat. No. 3,464,986.

This invention relates to new carbamyl compounds and to improved biologically active compositions containing the same.

According to the present invention there are provided new lactone-carbamyl compounds having the formula:

/R X Z h mt. l Y I wherein R stands for hydrogen or for a lower alkyl group and Z stands for oxygen or sulphur and wherein X and Y, which may be the same or different, each stand for a hydrogen atom or for an alkyl group or together represent a heterocyclic group including the adjacent N atom or wherein X stands for a hydrogen atom and Y stands for an alkylene, aryl, halo-substituted aryl, aralkyl, heterocyclic, heterocyclic-alkyl, dialkylamino, alkoxy-carbonyl alkyl or lactone-carbamyl-alkyl group.

The group is referred to herein as a carbamyl acid residue. The lactone ring is derived from tetrahydrofuran and contains five ring atoms. The lactone ring may bear a substituent additional to the carbamyl acid residue for example an alkyl group. The carbamyl acid residue which is required to be present is attached through a connecting atom of sulphur to the a-carbon atom of the lactone ring, that is to the carbon atom occupying the position adjacent to the carbonyl group of the lactone ring.

The nitrogen atom of the carbamyl acid residue may carry substituents X and Y each of which may be an alkyl group especially one having from one to six carbon atoms. When X stands for hydrogen the Y substituent may an alkylene group especially one having from one to six carbon atoms; a dialkylamino group, or a substituted alkyl group, wherein the substituent may be an alkoxy carbonyl group, a phenyl group, a heterocyclic group or a lactone-carbamyl group. The Y substituent may alternatively be a phenyl group or a substituted phenyl group for example a halophenyl group, such as chlorophenyl group. A heterocyclic group, for example, a morpholino group, may also be attached to the nitrogen atom of the carbamyl acid residue, or the latter may form part of a heterocyclic ring which can contain one or more hetero atoms. Thus compounds are included wherein the nitrogen atom forms part of a morpholino or piperidine ring.

Preferred compounds include those wherein R of the formula quoted above stands for hydrogen or a methyl group, and 2 stands for sulphur. When 2 stands for oxygen it is preferred that R stands for a methyl group. X and Y which may be the same or different, are preferably H, CH C,H iC H,-,nC l-l nC l-l, or nC, l-l When X is H then Y may be for example CH; CH CH CzHs-O-CO-CH:, C53 (CHM-(3g The compounds of the invention may be obtained by a number of different processes. For example a salt of a carbamic acid may be brought into reaction with a lactone having a replaceable halogen atom attached to a carbon atom of the lactone ring. Salts which may be employed are alkali, alkaline earth and ammonium salts although salts of tertiary amines may also be used. For most purposes the sodium salts of the acids are generally employed. The halo-lactones which may be employed may be either bromoor chloro-lactones. The halolactone is conveniently bromo-substituted, for example 2-oxo- 3-bromo-tetrahydrofuran.

Carbamic acids'and their salts vary greatly in their stability and monothioand dithiocarbamic acids and their salts are especially unstable. Therefore in order to make monoand dithiocarbamyl compounds a salt of the respective acid is prepared preferably immediately before use by bringing into reaction ammonia or a primary or secondary amine with either carbonyl sulphide or carbon disulphide in the presence of a base. The amine used in the reaction should have attached to the nitrogen atom an aliphatic, aromatic or heterocyclic group. Alternatively the nitrogen atom should form part of a heterocyclic ring. If desired the salt may be separated from the reaction mixture before treatment with a halo-lactone, however compounds are also obtained very conveniently by treating the reaction mixture of the carbonyl sulphide or the carbon disulphide, with the amine and the base, with the halo-lactone. Both the formation of a carbamate salt and its subsequent reaction with the halo-lactone takes place readily at ambient or elevated temperatures i.e. below about C and preferably below 50C. In general both reactions are carried out preferably at a temperature of from 20-40C. The reactions may be carried out in the presence either of water or an organic liquid although for most purposes water provides a very satisfactory medium and may be added in the form of an aqueous solution of the base used to form the carbamate salt or as a solution of the salt which is required to undergo reaction with the halo-lactone.

Other processes may be used for making the compounds including for example the bringing into reaction in the presence of a base of a carbamyl halide, a thiocarbamyl halide, an isocyanate or an isothiocyanate with a hydroxyor mercaptoderivative of a lactone. The processes are carried out preferably in the presence of a non-hydroxylic solvent, for example diethyl ether, benzene or petroleum ether at temperatures of 0-l00C and preferably at 20-40C.

The compounds may be used both in agriculture and horticulture. The compounds display fungicidial activity and are especially useful for the control of blast on rice (Piricularia cryzao), rust on wheat (Puccinia triticina) and sore skin on cotton (Rhizoctonia solani). The compounds are also useful as intermediates in the preparation of other biologically active compounds.

The compounds are preferably converted into formulations to assist in their application. For example they may be used in the form of a powdery composition in which a minor amount of the compound is present in admixture with a major amount of a solid diluent.

Suitable diluents include powdered kaolin, Fullers earth, gypsum, chalk, Hewitts earth and China clay. Since a certain number of the compounds are liquid at ordinary temperatures they are usually applied more conveniently in the form of a liquid preparation which is generally an aqueous dispersion or emulsion containing a surface active agent, for example a wetting or dispersing agent. Suitable surface active agents include condensation products of ethylene oxide with various substances, for example with alkylated phenols including octyl phenol and nonyl phenol; sorbitan monolaurate; oleyl alcohol; cetyl alcohol; and propylene oxide polymer. Other agents which are also suitable include calcium dodecyl benzenesulphonate, calcium butyl naphthalenesulphonate, calcium lignosulphonate, sodium lignosulphonate, ammonium lignosulphonate and glue. An alternative method for making liquid preparations comprises dissolving the compounds in an organic solvent for example benzene, methanol, ethanol, or acetone, and then agitating the solution with water containing a surface active agent.

The compounds are conveniently made available by a supplier in the form of a concentrate which is a composition containing a high proportion of the compound and which there fore is generally required to be diluted, usually with water, before application. The concentrates may contain from 10 to 85 percent by weight of the compound although for practical purposes from 25 to 65 percent by weight is usually preferred. An especially satisfactory form of concentrate comprises a concentrated solution of the compound in an organic solvent containing a surface active agent which is also soluble in the solvent. The diluted preparations which are suitable for application and which usually take the form of aqueous dispersions may contain amounts of compound which can vary widely. However good results are generally obtainable by using from 0.025 to 0.2 percent by weight of the compound. The compounds, preferably in a formulated condition, may be applied by conventional methods. Thus compounds which are to be used for their capacity to control diseases caused by fungi to the foliage of plants are applied more conveniently in the form of liquid preparations either to the plants or the soil in which plants are to be grown or are growing. Solid compositions are however preferably for the treatment of seeds to provide protection to the seeds from soil or seed borne diseases.

This invention is illustrated by the following examples:

EXAMPLE 1 This example illustrates the preparation of 2-oxo-3 (N- methyl-thiocarbamylthio) tetrahydrofuran having the formula:-

A solution of sodium hydroxide (8.0 g.) in water (15 c.c.) was added dropwise to a stirred mixture of methylamine 17.1 c.c. of a 40 percent aqueous solution) and carbon disulphide (12.6 c.c.). The temperature of the mixture during the addition the mixture was warmed to 40C, and stirring was continued until all the carbon disulphide had reacted. The temperature of the mixture was then reduced to 5C and 2-oxo-3- bromo tetrahydrofuran (33.0 g.) was added dropwise, with vigorous stirring. After the addition had been completed the mixture was stirred for a further period (0.5 hr.) and the product was then extracted with ether which was then removed by distillation.

As a result of the removal of the ether 2-oxo-3 (N- methylthiocarbamylthio) tetrahydrofuran was obtained as an oil which crystallized on standing. The product was then purified by recrystallization from aqueous ethanol and was then found to possess a melting point of 606lC.

EXAMPLE 2 This example illustrates the preparation of 2-oxo-3 (N-allylthiocarbamylthio) tetrahydrofuran having the formula:

Carbon disulphide (6.3 c.c. was added dropwise with stirring to a mixture of allylamine (7.5 c.c.) and a solution of sodium hydroxide (4.0 g.) in water c.c.). The temperature of the mixture was kept below 30C until the reaction was completed. The mixture was then diluted with water c.c.) and 2-oxo-3-bromo-tetrahydrofuran 16.5 g.) added slowly EXAMPLE 3 This example illustrates the preparation of 2-oxo-3 (N-pchlorophenylthiocarbamylthio) tetrahydrofuran having the formula:

S til--Nll-ils A solution of p-chloro-aniline (12.8 g.) in ethanol (32 c.c.) was added slowly to a mixture of carbon disulphide (7 c.c.) and an aqueous solution of ammonia (Specific Gravity 0.880; 16 c.c.) at 5C. The mixture was stirred for 4 hours at l52OC and then cooled at 0C. A yellow precipitate of ammonium N-p-chlorophenyldithiocarbamate was formed and was then removed by filtration and the resulting solid was then washed with alcohol (10 c.c.). Ammonium N-p-chlorophenyldithiocarbamate (16.2 g.) formed in the above process was dissolved in water (20 c.c.) and the solution cooled to 5C. 2- Oxo-3-bromo-tetrahydrofuran (12.1 g.) was then added slowly with vigorous stirring, and at the same time the temperature of the reaction mixture was maintained below 10C by external cooling. 2-Oxo-3 (N-p-chlorophenyl-thiocarbamylthio) tetrahydrofuran was obtained as a white solid which on recrystallization from ethanol was found to have a melting point of -106C.

EXAMPLE 4 This example illustrates the preparation of 2-oxo-3 (N- dimethylaminothiocarbamylthio) tetrahydrofuran having the formula:

The procedure of Example 2 was followed except that 1,1 dimethylhydrazine (6 g.) was used in place of allylamine. 2- Oxo-3 (N-dimethylaminothiocarbamylthio) tetrahydrofuran was obtained as a solid which on recrystallization from ethanol was found to possess a melting point of 136C.

EXAMPLE 5 This example illustrates the preparation of 2-oxo-3 (N-diisopropylaminothiocarbamylthio) tetrahydrofuran having the formula:

The procedure of Example 4 was followed except that 1,1- di-isopropylhydrazine (l 1.6 g.) was used in place of 1,1- dimethylhydrazine. 2-Oxo-3 (N-di-isopropylaminocarbamylthio) tetrahydrofuran, was obtained as a yellow solid which after recrystallization from ethanol was found to possess a melting point of 123C.

EXAMPLE 6 This example illustrates the preparation of 2-oxo-3 (N,N- dimethylthiocarbamylthio) tetrahydrofuran having the formu- 1a:

EXAMPLE 7 This example illustrates the preparation of 2-oxo-3 (N- methylthiocarbamylthio)5-methyltetrahydrofuran having the formula:

CH; S i CH NH Sb Carbon disulphide (6.3 c.c.) was added dropwise to a 40 percent aqueous solution of methylamine (16 c.c.). The exothermic reaction yielded methylammonium N-methyldithiocarbamatewhich was obtained as a dry salt by removal under reduced pressure of the water and excess reactants. The dry salt g.) was dissolved in water (20 c.c.) and 2-oxo-3- bromo-5-methyltetrahydrofuran (13 g.) was added dropwise with vigorous stirring. After stirring for a further period (2 hours) the product was extracted with ether and the extract distilled to remove the solvent. 2-Oxo-3 (N-methylthiocarbamylthio)-S-methyltetrahydrofuran was obtained as an oil boiling at l32135C at a pressure of 0.2 mm. of mercury.

EXAMPLE 8 This example illustrates the preparation of 2-oxo-3 (N- ethylthiocarbamylthio)-5-methyltetrahydrofuran having the solidified on standing. The solid was then dissolved in water- (15 c.c.) and 2-oxo-3-bromo-5-methyltetrahydrofuran was added dropwise. During the addition the temperature of the reaction mixture was maintained below 10C. The addition was followed by a further period of stirring (0.5 hour), after which the product was extracted with ether and the extract distilled to remove the solvent. 2-Oxo-3 (N-ethylthiocarbamylthio)-S-methyltetrahydrofuran was obtained as a yellow oil, boiling at a temperature of 123-131C at a pressure of 0.03 mm. of mercury.

EXAMPLE9 This example illustrates the preparation of 2-oxo-3 (N- isopropylthiocarbamylthio)-5-methy1tetrahydrofuran having the formula:

The procedure of Example 8 was followed except that isopropylamine (8.5 c.c.) was used in the place of ethylamine. 2-Oxo-3 (N-isopropylthiocarbamylthio)-5-methyltetrahydrofuran was obtained as a yellow oil boiling at a temperature of 143C at a pressure of 0.04 mm. of mercury.

EXAMPLE 10 This example illustrates the preparation of 2-oxo-3 (N-n-butylthiocarbamylthio)-5-methy1tetrahydrofuran having the formula:

The procedure of Example 8 was followed except that n-butylamine (10.5 c.c.) was used in the place of ethylamine. 2- Oxo-3 (N-n-buty1thiocarbamylthio)-5-methyltetrahydrofuran was obtained as a yellow oil boiling at a temperature of 136-141C at a pressure of0.l mm. ofmercury.

EXAMPLE 1 1 This example illustrates the preparation of 2-oxo-3 (N-nhexylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

EXAMPLE [2 This example illustrates the preparation of 2-oxo-3 (N-ndodecylthiocarbamylthio)-5-methy1tetrahydrofuran having the formula:

-C Ha The procedure of Example 8 was used except that ndodecylamine 18.5 g.) was used in the place of ethylamine. 2- 0xo-3 (N-n-dodecylthiocarbamylthio)-5-methyltetrahydrofuran was obtained initially as an oil boiling at a temperature of l60-l 70C at a pressure of 0.09 mm. of mercury. The oil solidified on standing and the solid after recrystallization from aqueous ethanol was found to melt at 72C.

EXAMPLE 13 This example illustrates the preparation of 2-oxo-3 (N-allylthiocarbamylthio)--methyltetrahydrofuran having the formula:

The procedure of Example 2 was followed except that 2- oxo-3-bromo-5-methyltetrahydrofuran (17.9 g.) was used in the place of 2-oxo-3-bromo-tetrahydrofuran. 2-Oxo-3 (N-allylthiocarbamylthio)-5-methyltetrahydrofuran was obtained as an oil boiling at a temperature of 142l44C at a pressure of 0.07 mm. ofmercury.

EXAMPLE 14 This example illustrates the preparation of 2-oxo-3 (N- phenylthiocarbamylthio)-5-methy1tetrahydrofuran having the formula:

The procedure of Example 8 was followed except that aniline (9.3 c.c.) was used in the place of ethylamine. 2-Ox0-3 (N-phenylthiocarbamylthio)-g5-methyltetrahydrofuran was obtained as a solid which on recrystallization from ethanol was found to melt at 119C.

EXAMPLE 15 This example illustrates the preparation of 2-oxo-3 (N-pchlorophenylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

EXAMPLE 16 This example illustrates the preparation of 2-oxo-3 (N- dimethylaminothiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 4 was followed except that 2- oxo-3-bromo-5-methyltetrahydrofuran 17.8 g.) was used in the place of 2oxo-3-bromo-tetrahydrofuran. 2-Ox0-3 (N- dimethylaminothiocarbamylthio)-5-methy1tetrahydrofuran was obtained as a solid which on recrystallization from ethanol was found to possess a melting point of l25-127C.

EXAMPLE 17 This example illustrates the preparation of 2-oxo-3 (N- benzylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 8 was followed except that benzylamine (10.7 g.) was used in the place of ethylamine. 2- Oxo-3 (N-benzylthiocarbamylthio)-5-methyltetrahydrofuran was formed as a solid which on recrystallization was found to possess a melting point of 89C.

EXAMPLE 18 This example illustrates the preparation of 2-oxo-3 (N-lphenethylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

CH: S

The procedure of Example 8 was followed except that lphenethylamine (12.1 g.) was used in the place of ethylamine. 2-Oxo-3 (N-1-phenethylthiocarbamylthio)-5-methyltetrahydrofuran was obtained as a solid which after recrystallization from ethanol was found to possess a melting point of 98C.

EXAMPLE 19 This example illustrates the preparation of 2-oxo-3 (N-2- phenethylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 8 was followed except that 2- phenethylamine (12.1 g.) was used in the place of ethylamine 2-Oxo-3 (N-2-phenethylthiocarbamylthio)-5-methyltetrahydrofuran was obtained as a solid which after recrystallization from ethanol was found to possess a melting point of 102C.

EXAMPLE 20 This example illustrates the preparation of 2-oxo-3 (N- tetrahydropyran-2-ylmethylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 8 was followed, except that 2- aminomethyltetrahydropyran (11.5 g.) was used in the place of ethylamine. The compound was obtained as a viscous yellow oil having a boiling point of l58-l68C at a pressure of 0.15 mm. of mercury.

EXAMPLE 2] This example illustrates the preparations of 2-oxo-3 (N- ethoxycarbonylmethylthiocarbamylthio)-5-methyltetrahydrofuran having the formula:

EXAMPLE 22 This example illustrates the preparation of 2-oxo-3 (N,N- dimethylthiocarbamylthio)-S-methyltetrahydrofuran having the formula:

The procedure of Example 6 was followed except that 2- oxo-3-bromo-S-methyltetrahydrofuran (17.8 g.) was used in the place of 2-oxo-3-bromo-tetrahydrofuran. 2-Oxo-3 (N,N- dimethylthiocarbamylthio)-5-methyltetrahydrofuran was obtained as a solid which after recrystallization from ethanol was found to possess melting point of 84C.

EXAMPLE 23 This example illustrates the preparation of 2-oxo-3 (N- methylcarbamylthio )-S-methyltetrahydrofuran having the formula 0 l orn-NH-d-s- O Carbonyl sulphide l 1.8 g.) was bubbled into-a stirred icecooled mixture of a 40 percent aqueous solution of methylamine (15.2 c.c.), triethylamine (20.2 g.) and water (50 mls.) at a rate of l to 2 liters per hour. When the addition was completed, the mixture was treated with 2-oxo-3-bromo-5 methylttrahydrofuran (35.8 g.), dropwise, with vigorous stirring. The mixture was then allowed to stand overnight after which sodium chloride was added. The aqueous solution was then extracted with ether after which the extract was distilled to remove the ether. 2-Oxo-3 (N-methylcarbamylthio)-5- methyltetrahydrofuran was obtained as a solid which after recrystallization from diethyl ether was found to possess a melting point of 88C.

EXAMPLE 24 This example illustrates the preparation of 2-oxo-3 (N- ethylcarbamylthio)-5-methyltetrahydrofuran having the formula:

om-cm-Nni.

The procedure of Example 23 was followed, except that ethylarnine percent aqueous solution, 13 c.c.) was used in the place of the methylamine solution. 2-Oxo-3 (N-ethylcarbamylthio)-5-methyltetrahydrofuran was obtained as a yellow oil having a boiling point of l34-l 38C at a pressure of 0.15 mm. of mercury.

EXAMPLE 25 This example illustrates the preparation of 2-oxo-3 (N- isopropylcarbamylthio) tetrahydrofuran having the formula:

The procedure of Example 23 was followed except that isopropylamine (11.8 g.) was used in the place of the methylamine solution, and 2-oxo-3-bromo-tetrahydrofuran (33 g.) was used in the place of the 2-oxo-3-bromo-5-methyltetrahydrofuran. 2-Oxo-3 (N-isopropylocarbamylthio) tetrahydrofuran was obtained as a solid which on recrystallization from ethanol was found to possess a melting point of 132C.

EXAMPLE 26 This example illustrates the preparation of 2-oxo-3 (N- dimethylaminocarbamylthio)-S-methyltetrahydrofuran having the formula:

The procedure of Example 23 was followed except that 1,]- dimethylhydrazine (12 g.) was used in the place of the methylamine solution. 2-Oxo-3 (N-dimethylaminocarbamylthio)-5-methyltetrahydrofuran was obtained as a white solid, which after recrystallization from water was found to possess a melting point of 129C. I

EXAMPLE 27 This example illustrates the preparation of ethylene bis (2- oxo-5-methyltetrahydrofuran-3-yldithiocarbamate) having the formula:

EXAMPLE 28 This example illustrates the preparation of 2-oxo-3 (thiocarbamylthio)-5-methyltetrahydrofuran having the formula:

CH S l NIH-ii-S To a solution of ammonia in ethanol l 1.4 percent w/v; 250 c.c.) was added with stirring a solution of carbon disulphide (6O c.c.) in ethanol (250 c.c.), the temperature being kept at 20C during the addition. The mixture was stirred at 20C for 2 hours, followed by a period of standing (16 hours), after which the yellow crystalline precipitate of ammonium dithiocarbomate was filtered off.

To a solution of ammonium dithiocarbamate (12 g.) in water c.c.) was added with stirring 2-oxo-3-bromo-5- methyltetrahydrofuran (17.9 g.) dropwise with external cooling to keep the reaction temperature below 25C when a yellow oil was separated which solidified on standing. On recrystallization from chloroform this yielded 2-oxo-3 (thiocarbamylthio)-S-methyltetrahydrofuran as a cream solid having a melting point of l 10C.

EXAMPLE 29 This example illustrates the preparation of 2-oxo-3 (N-pentamethylene thiocarbamylthio) tetrahydrofuran having the formula:

EXAMPLE 30 This example illustrates the preparation of 2-oxo-3 (N-pentamethylenethiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 29 was followed except that 2- oxo-3-bromo-5-methyltetrahydrofuran (17.9 g.) was used in the place of 2-oxo-3-bromo-tetrahydrofuran 2-Oxo-3 (N-pentamethylenethiocarbamylthio)-S-methyltetrahydrofuran is a solid having a melting point of 78C after recrystallization from ethanol.

EXAMPLE 31 This example illustrates the preparation of 2-oxo-3 (N-3- oxa-pentamethylenethiocarbamylthio) tetrahydrofuran having the formula:

*1. ...& s

The procedure of Example 29 was used except that morpholine (8.7 c.c.) was used in the place of piperidine. The product 2-oxo-3 (N-3-oxa-pentamethylenethiocarbamylthio) tetrahydrofuran is a solid having a melting point of 71C after recrystallization from ethanol.

EXAMPLE 32 This example illustrates the preparation of 2-oxo-3 (N-3- oxa-pentamethylenethiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 30 was followed except that morpholine (8.7 c.c.) was used in place of piperidine. The product 2-oxo-3(N-3-oxa-pentamethylenethiocarbamylthi0)- S-methyltetrahydrofuran is a solid having a melting point of l 14C after recrystallization from ethanol.

EXAMPLE 33 This example illustrates the preparation of 2-oxo-3(thiocarbamylthio) tetrahydrofuran having the formula:

The procedure of Example 28 was followed except that 2- oxo-3-bromo-tetrahydrofuran (16.5 g.) was used in the place of 2-oxo-3-bromo-5-methyltetrahydrofuran. The product, 2- oxo-3(thiocarbamylthio) tetrahydrofuran, is a solid having a melting point of C after recrystallization from a mixture of methanol and petroleum ether (40-60).

EXAMPLE 34 This example illustrates the preparation of 2-oxo-3 (N-hexamethylenethiocarbamylthio)-5-methyltetrahydrofuran having the formula:

The procedure of Example 30 was followed except that hexamethyleneimine (9.9 g.) was used in place of piperidine. The product 2-oxo-3 (N-hexamethylenethiocarbamylthio)-5- methyltetrahydrofuran is a solid having a melting point of 60C after recrystallization from ethanol.

EXAMPLE 35 This example illustrates the preparation of 2-oxo-3 (N-pentamethylenecarbamylthio)-5-methyltetrahydrofuran having the formula:

. o L task The procedure of Example 23 was followed except that piperidine (18.6 g.) was used in place of the methylamine solution. The product, 2-oxo-3(N-pentamethylenecarbamylthio)--methyltetrahydrofuran, was obtained as an oil having a boiling point of l46150C at a pressure of 0.03 mm. of mercury.

EXAMPLE 36 This example illustrates the preparation of 2-oxo-3 (N- phenylcarbamylthio)-S-methyltetrahydrofuran having the formula:

@NHish The procedure of Example 26 was followed except that aniline (18.6 g.) was used in the place of 1,1-dimethylhydrazine. The product, 2-oxo-3 (N-phenylcarbamylthio)-5- methyltetrahydrofuran is a solid having a melting point of 125C after recrystallization from a mixture of chloroform and petroleum ether (40-60).

EXAMPLE 37 This example illustrates the preparation of 2-oxo3 (N-4- morpholinylthiocarbamylthio) tetrahydrofuran having the for- EXAMPLE 38 This example illustrates the preparation of 2-oxo-3 (N-2- phenethylcarbamylthio) tetrahydrofuran having the formula:

' ing a boiling point of l74"C at a pressure of 0.04 mm. of mercury. I

The compounds were tested against various fungal diseases and the results of these tests are shown in Tables 1 and 11 below.

In the tests involving foliage diseases the plants were sprayed with a solution or suspension containing 500 parts per million of the active compound and 0.1 percent of a wetting agent and after 24 hours were inoculated with the disease the extent of which was assessed visually at the end of the test. The results are shown in Table I below as a grading giving the percentage amount of disease as follows:

In the tests involving seed and soil, for the diseases F usarium culmorum and Pythium ultimum the seeds were dressed with a formulation containing 25 percent of the active ingredient and 75 percent china clay to give on the seed 1,000 ppm. (wheat) and 500 ppm (peas). The seeds were then sown in a partially sterilized soil to which a 2 percent inoculum of the fungus had been added. The seedlings were examined at the end of the test and the figures given in Table 2 are the number of healthy plants expressed as a percentage. In the test against Phizoctania solani the active compound was mixed at the rate of parts per million with soil which had been artificially inoculated with a pure culture of the disease. Un-

treated cotton seed was sown in the soil in pots 3 days later and a count of the healthy seedlings are made at the end of the test. The figures in Table 2 are expressed as a percentage of the seedlings which were healthy. In the test against Xanthomonas malvacearum naturally infected cotton seed was dressed at the rate of 1,250 parts per million of the active compound and the seed was then sown in sterilized loam in pots. At the end of the test the disease was assessed and the figures given in the table are the number of healthy plants expressed as a percentage.

TABLE 2 Fusurium Pyrltium Rhizoclonia Xanthamonas Example culmorum ulrimum solam' malvacearum Foot-rot) (Foot-rot) Sore-shin) (Black arm) N 0. Wheat Peas Cotton Cotton days 20 days 20 days 10 days 1 75 2 l5 3 l9 4 l6 7 l4 91 84 8 l6 l3 l6 I6 23 18 l l 2l 2l 22 5 3 23 33 27 20 32 I9 34 18 What we claim is: l. A fungicidal composition comprising a fungicidally efiective amount of a compound having the formula:

wherein R stands for hydrogen or lower alkyl, Z stands for exygen or sulphur, X and Y each stand for hydrogen or alkyl of up to 12 carbon atoms or together with the adjacent nitrogen atom represent a hexamethylenimino, morpholino, or piperidino ring or wherein X stands for a hydrogen atom and Y stands for allyl, chlorophenyl, phenyl-substituted alkyl containing one to two carbon atoms, phenyl, morpholino, dialkylamino containing up to 3 carbon atoms in each alkyl group, ethoxycarbonylmethyl, tetrahydropyran-Z-yl methyl, or 5- methyl-2-oxo-3-thiocarbamylthio-tetrahydrofuran-ethylene, R being alkyl when Y is alkyl, in admixture with a diluent carrier for said compound.

2. A fungicidal composition according to claim 1 wherein the diluent is selected from the group consisting of solid diluents and aqueous diluents containing a wetting agent.

* i I! I UNITED STATES PATENT OFFICE CERTENCATE OF CORREITEGN Patent No 3 1 i1 Ranajit Ghosh and Nigel Douglas Bishgg Dated July 18, 97

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the title in the patent heading, and in column 1, the title should be corrected so that the term "V" should read as Y-"w In the heading, delete 7'Ranijit" and insert --Ranajit-,. T

IN THE SPECIFICATION Column 1, line 3, delete "my" and insert --our--.

In line 61, the formula should read as: --CH CH CH Column 2, line 51, I delete "cryzao and insert ..-oryzao--, and delete "triticina" and insert ---recondita-.

Column line 23, the term "200" should read as a -20 0- T T I V 7 Column 5, line 55, the. formula should read as:

s CH3 1 ---CH3 CH2; NH c s I e FOHr-j wd-1050 (ac-en usc M -oc. chum-PM p qg gp unmu plums null; la n: s dan-#14 UNITED STATES PATENT OFFKCE UER'HFEQATE OF CORRECTION Patent No. 3 ,678';167 Dated July 18, m7?

Inventor(s) Ra najit Ghosh and Nigel, Dogglgs Eiglggp ppears in the above-identified patent hereby corrected as shown below:

It is certified that error a and that said Letters Patent are (Cont. of Pegel) Column 1, line 33, the formula should read as:

Column 7, line 75, the formulashould read as:

LJQCOMM-QC 0031 04 69 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTIQN Patent 2.678.167 l pared Julv 18, 1972 Inventor(s) Ranajit Ghosh and Nigel Douglas Bishop It is certified that error appears in theabove-identified patent and that said Letters Patent are hereby corrected as shown below:

(Cont. of Page 2) Column 11, line 47, the formula should read as:

Column l t, line 30, delete "recondiia" and insert --recondita-v-, and delete "cryzae" and insert -'--oryzao--.

Signed and sealed this 1st day of'Jauary 1974.

(SEAL) Attest:

EDWARD M. FLETCHEEJR. RENE D. Attesting Officer Acting Commiss oner of Patents O P0 USCOMM Dc c0370 P09 

2. A fungicidal composition according to claim 1 wherein the diluent is selected from the group consisting of solid diluents and aqueous diluents containing a wetting agent. 